82. WRITE A C PROGRAM TO FIND THE FACTORIAL OF A NUMBER USING RECURSION

/* C Program to find factorial of a given number using recursion*/

#include <stdio.h>

int factorial(int);

int main()
{
int num;
int result;

printf("Enter a number to find it's Factorial: ");
scanf("%d", &num);
if (num < 0)
{
printf("Factorial of negative number not possible\n");
}
else
{
result = factorial(num);
printf("The Factorial of %d is %d.\n", num, result);
}
return 0;
}
int factorial(int num)
{
if (num == 0 || num == 1)
{
return 1;
}
else
{
return(num * factorial(num - 1));
}
}

output

Enter a number to find it's Factorial: 6
The Factorial of 6 is 720.